--- a/flys-artifacts/ChangeLog	Thu Jun 21 17:01:17 2012 +0000
+++ b/flys-artifacts/ChangeLog	Fri Jun 22 09:59:12 2012 +0000
@@ -1,3 +1,12 @@
+2012-06-22	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/fixings/FixCalculation.java:
+	  Calculate the standard deviation of the Q sector delta Ws, too.
+
+	* src/main/java/de/intevation/flys/artifacts/model/fixings/AnalysisPeriod.java:
+	  Store the standard deviation of the Q sector delta Ws, too.
+	  Indexed 0..3; NaN means the std dev for this sector is not existing.
+
 2012-06-21	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
 
 	* src/main/java/de/intevation/flys/artifacts/model/GaugeRange.java:

--- a/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/fixings/AnalysisPeriod.java	Thu Jun 21 17:01:17 2012 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/fixings/AnalysisPeriod.java	Fri Jun 22 09:59:12 2012 +0000
@@ -8,6 +8,7 @@
     protected DateRange dateRange;
     protected QWD []    qwds;
     protected QWD []    qSectorAverages;
+    protected double [] qSectorStdDevs;
 
     public AnalysisPeriod() {
     }
@@ -19,16 +20,18 @@
     public AnalysisPeriod(DateRange dateRange, QWD [] qwds) {
         this(dateRange);
         this.dateRange = dateRange;
-        this.qwds = qwds;
+        this.qwds      = qwds;
     }
 
     public AnalysisPeriod(
         DateRange dateRange,
         QWD []    qwds,
-        QWD []    qSectorAverages
+        QWD []    qSectorAverages,
+        double [] qSectorStdDevs
     ) {
         this(dateRange, qwds);
         this.qSectorAverages = qSectorAverages;
+        this.qSectorStdDevs  = qSectorStdDevs;
     }
 
     public DateRange getDateRange() {
@@ -59,6 +62,18 @@
         return qSectorAverages[i];
     }
 
+    public double [] getQSectorStdDevs() {
+        return qSectorStdDevs;
+    }
+
+    public void setQSectorStdDevs(double [] qSectorStdDevs) {
+        this.qSectorStdDevs = qSectorStdDevs;
+    }
+
+    public double getQSectorStdDev(int i) {
+        return qSectorStdDevs[i];
+    }
+
     public double getMaxQ() {
         double maxQ = -Double.MAX_VALUE;
         if (qwds != null) {

--- a/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/fixings/FixCalculation.java	Thu Jun 21 17:01:17 2012 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/fixings/FixCalculation.java	Fri Jun 22 09:59:12 2012 +0000
@@ -15,8 +15,6 @@
 
 import de.intevation.flys.artifacts.model.FixingsOverview.Fixing.Filter;
 
-import de.intevation.flys.artifacts.model.Range;
-
 import de.intevation.flys.artifacts.model.FixingsOverview.Fixing;
 import de.intevation.flys.artifacts.model.FixingsOverview.IdsFilter;
 import de.intevation.flys.artifacts.model.FixingsOverview.KmFilter;
@@ -26,6 +24,7 @@
 import de.intevation.flys.artifacts.model.FixingsOverview;
 import de.intevation.flys.artifacts.model.FixingsOverviewFactory;
 import de.intevation.flys.artifacts.model.Parameters;
+import de.intevation.flys.artifacts.model.Range;
 
 import de.intevation.flys.utils.DateAverager;
 import de.intevation.flys.utils.DoubleUtil;
@@ -37,6 +36,8 @@
 import java.util.List;
 import java.util.Map;
 
+import org.apache.commons.math.stat.descriptive.moment.StandardDeviation;
+
 import org.apache.log4j.Logger;
 
 public class FixCalculation
@@ -362,7 +363,9 @@
                     analysisPeriod.getFrom(),
                     analysisPeriod.getTo());
 
-                QWD [] qSectorAverages = new QWD[4];
+                QWD []    qSectorAverages = new QWD[4];
+                double [] qSectorStdDevs  = new double[4];
+
                 ArrayList<QWD> allQWDs = new ArrayList<QWD>();
 
                 // for all Q sectors.
@@ -384,6 +387,8 @@
                     double sumQ = 0.0;
                     double sumW = 0.0;
 
+                    StandardDeviation stdDev = new StandardDeviation();
+
                     List<QWD> qwds = new ArrayList<QWD>(metas.size());
 
                     dateAverager.clear();
@@ -406,6 +411,8 @@
 
                         double dw = (wq[0] - fw)*100.0;
 
+                        stdDev.increment(dw);
+
                         Date date = column.getDate();
                         String description = column.getDescription();
 
@@ -439,13 +446,20 @@
 
                             qSectorAverages[qSector] = avgQWD;
                         }
+                        qSectorStdDevs[qSector] = stdDev.getResult();
+                    }
+                    else {
+                        qSectorStdDevs[qSector] = Double.NaN;
                     }
                 } // for all Q sectors
 
                 QWD [] aqwds = allQWDs.toArray(new QWD[allQWDs.size()]);
 
                 AnalysisPeriod periodResult = new AnalysisPeriod(
-                    analysisPeriod, aqwds, qSectorAverages);
+                    analysisPeriod,
+                    aqwds,
+                    qSectorAverages,
+                    qSectorStdDevs);
                 periodResults.add(periodResult);
             }